import axios from 'axios';
import { load } from 'cheerio';

// TODO přesunout do types
type PizzaSize = {
    varId: number,
    size: string,
    pizzaPrice: number,
    boxPrice: number,
    price: number
}

// TODO přesunout do types
type Pizza = {
    name: string,
    ingredients: string[],
    sizes: PizzaSize[],
}

// TODO mělo by být konfigurovatelné proměnnou z prostředí s tímhle jako default
const baseUrl = 'https://www.pizzachefie.cz';
const pizzyUrl = `${baseUrl}/pizzy.html?pobocka=plzen`;

const buildPizzaUrl = (pizzaUrl: string) => {
    return `${baseUrl}/${pizzaUrl}`;
}

// Ceny krabic dle velikosti
const boxPrices: { [key: string]: number } = {
    "30cm": 13,
    "35cm": 15,
    "40cm": 18,
    "50cm": 25
}

/**
 * Stáhne a scrapne aktuální pizzy ze stránek Pizza Chefie.
 */
export async function downloadPizzy(): Promise<Pizza[]> {
    // Získáme seznam pizz
    const html = await axios.get(pizzyUrl).then(res => res.data);
    const $ = load(html);
    const links = $('.vypisproduktu > div > h4 > a');
    const urls = [];
    for (let i = 0; i < links.length; i++) {
        if (links[i].name === 'a' && links[i].attribs?.href) {
            const pizzaUrl = links[i].attribs?.href;
            urls.push(buildPizzaUrl(pizzaUrl));
        }
    }
    // Scrapneme jednotlivé pizzy
    const result: Pizza[] = [];
    for (let i = 0; i < urls.length; i++) {
        const pizzaUrl = urls[i];
        const pizzaHtml = await axios.get(pizzaUrl).then(res => res.data);
        // Název
        const name = $('.produkt > h2', pizzaHtml).first().text()
        // Přísady
        const ingredients: string[] = []
        const ingredientsHtml = $('.prisady > li', pizzaHtml);
        ingredientsHtml.each((i, elm) => {
            ingredients.push($(elm).text());
        })
        // Velikosti
        const sizes: PizzaSize[] = [];
        const a = $('.varianty > li > a', pizzaHtml);
        a.each((i, elm) => {
            const varId = Number.parseInt(elm.attribs.href.split('?varianta=')[1].trim());
            const size = $($(elm).contents().get(0)).text().trim();
            const price = Number.parseInt($($(elm).contents().get(1)).text().trim().split(" Kč")[0]);
            sizes.push({ varId, size, pizzaPrice: price, boxPrice: boxPrices[size], price: price + boxPrices[size] });
        })
        result.push({
            name: name,
            ingredients: ingredients,
            sizes: sizes,
        });
    }
    return result;
}